Elegant users forum

Hi Michael, Is it possible to add one input for sddsnaff such that it analyzes data at the input frequency? The problem arises when I apply naff to the turn-by-turn data of all the BPMs in the ring. In principle the main frequency should be the same for different BPMs; however, a small spread comes ...

Hi Michael, Is there a way to extend the indicated functionality of the optimization command in Elegant? For example, can I use sdds commands to manipulate the output files (such as the output files from the Watch elements) and put the expression in the optimization equations? I could realize this u...

Hi Michael,

Thanks for showing me the trick!

Weiming

Hi Michael, The error circumstance is not what I thought. Use the attched file: test0.sdds and the following command: sddsinterp test0.sdds test1.sdds -col=x,Byn10 -atValues=0.00013942073576 -order=4 The reason it quits is because there are many repeated values as following: x: -2,-1,0,0,0,0,0,0,1,2...

Hi Michael,

When I use sddsinterp and set -order=4, the program returns an error message: zero denominator in LagrangeInterp when
the interpolation happens to be on the grid. What should I do?

Many thanks,

Weiming

Hi Michael,

I tried again, it turns out that

Mark#1.nux is equivalent to Mark#1.psix, except a factor of 2pi.

Thanks a lot!

Weiming

Hi Michael,

Would you consider adding the psix and psiy column for the optimizer? I am having the same trouble.

Best regards,

Weiming

You can also try the elegant input file attached in my previous email. It doesn't need any shell commands.


Weiming

Michael,

Thanks a lot!

So if the steering knob is set to zero, the "correct" command will not use the corrector for orbit correction, but the "close_orbit" command still takes the kick into account. Is this understanding correct?

Regards,

Weiming

Hi Michael, Is there a simple way to modify the code such that Elegant corrects the closed orbit using a set of selected trims and BPMs? For example, I'd like to simulate fast orbit correction using only the fast correctors, and maybe part of the BPMs. The misalignment error is already corrected; th...